KNAC
| Acronym | Definition |
|---|---|
| KNAC | Keck Northeast Astronomy Consortium (est. 1990) |
| KNAC | Koninklijke Nederlandse Automobiel Club (Dutch: Royal Dutch Automobile Club; est. 1898) |
| KNAC | Kraft North America Commercial (Northfield, IL) |
| KNAC | Kenya National Assurance Company (insurance) |